change screen brightness

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change screen brightness

24 January 2024, 09:38:38

I do:

cat /sys/class/backlight/intel_backlight/brightness
851

I try:

Code: [Select]

echo 100 > /sys/class/backlight/intel_backlight/brightness

And I get an input/output error.

If I load plasma libraries by opening up dolphin, then it works fine. But i'd rather be able to do without plasma/kde libraries.

Re: change screen brightness

Reply #1 – 24 January 2024, 13:00:37

The easiest method to control backlight is using ACPI interface
I useacilight to control backlight.
maybe you need to follow the setup instruction mentioned in the gitlab of acpilight.

Re: change screen brightness

Reply #2 – 25 January 2024, 05:08:58

On my laptop, I added a toolbar (XFCE4) containing four nice icons to adjust the screen brightness:

Code: [Select]

sudo pacman -Sy acpilight
(a backward-compatible xbacklight replacement)

Then, I created 4 or 5 launchers with nice icons in a toolbar:
xbacklight =1
xbacklight =10
xbacklight =50
xbacklight =100